Bristle arrangement for a toothbrush



FIG. 1 is a perspective view of the bristle arrangement for a toothbrush showing the new design;

FIG. 2 is a front view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof.

The broken lines in the drawings depict portions of the article and form no part of the claimed design. 

CLAIM The ornamental design for a bristle arrangement for a toothbrush, as shown and described. 